摘要
通过室内土柱培养,研究了PAM、沃特保水剂、β-环糊精、腐殖酸对黄绵土持水性能的改良效果。结果表明,不同改良剂在不同浓度下的土壤水分特征不同,但都符合土壤含水量与土壤吸力之间的关系式;在浓度0.05%~0.4%时,在同一改良剂处理下a值的大小变化规律是随浓度的增加而增大,即:0.4%>0.2%>0.1%>0.05%>CK;在同一浓度下,不同改良剂在培养3周和2个月时,不同改良剂处理下的a值的大小为PAM>沃特保水剂>β-环糊精>腐殖酸;在培养4个月后,在浓度<0.2%时,a值的大小变化规律为:PAM>沃特保水剂>β-环糊精>腐殖酸;在浓度0.2%~0.4%时,a值的大小变化规律为:PAM>沃特保水剂>腐殖酸>β-环糊精。
The effects of four soil amendments(PAM,β-cyclodextrin,Wote super absorbent,and humic acid) on soil water retention capacity of Loessial soil are studied in a soil column experiment.Results show that the effects of the amendments on Loessial soil all conform to the equation for soil water content and soil suction.Under the condition of a single amendment,a value is increased with the amendment concentration in the range of 0.05%～0.4%.After 3 weeks or 2 months,a value also changes with the same amendment con...
出处
《水土保持通报》
CSCD
北大核心
2009年第1期133-137,141,共6页
Bulletin of Soil and Water Conservation
基金
国家科技支撑计划项目“宽谷互陵区农牧综合开发模式与示范”(2006BAD09B08)
国家高技术研究发展计划(863)项目“宁夏半干旱现代节水农业技术研究与集成”(2006AA100219)
关键词
黄绵土
土壤改良剂
土壤持水性
Loessial soil
soil amendment
water retention capacity
